Barbecue grill assembly



FIG. 1 is a perspective view of a barbecue grill assembly, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The details shown in broken lines in all views are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a barbecue grill assembly, as shown and described. 